Let's just let our imaginations run away with us for a moment (Pete excluded if he so wishes :-) )
So what if they do find a chamber the other side of the door. A chamber capable of standing up in, say. Maybe with something in it.
How do we get in!
Or will that be the next big waiting game. I certainly hope that no destructive methods would ever be allowed, no matter how great the potential prize!
Just a thought.